Conservative restorations of endodontically compromised anterior teeth in paediatric patients: physical and mechanical considerations

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ABSTRACT

Aim

Objective of this in vitro study was to evaluate the influence of fiber post placement on fracture resistance of
pulpless anterior teeth restored with standardised Class III and Class IV resin composite fillings. MATERIALS AND

Methods

One hundred and five human maxillary central incisors were selected and randomly divided into 7 (n=15)
experimental groups (endodontic therapy/ endodontic therapy and one Class III resin composite filling/ endodontic therapy
and one Class IV resin composite filling/ endodontic therapy and two Class III resin composite fillings/ endodontic therapy,
fiber post and one Class III resin composite filling/ endodontic therapy, fiber post and one Class IV resin composite filling/
endodontic therapy, fiber post and two Class III resin composite fillings). Specimens underwent fracture strength test. Means
(N) were calculated and data were analysed using 1-way ANOVA and Tukey multiple comparisons tests (p=0.05).

Results

Concerning teeth with two Class III, fiber post placement significantly increased fracture strength values from 603.59 to 864.24
N. Specimens restored with one Class III (795.21 N without post, 936.68 N with post) showed higher fracture strength values if
compared with specimens with two Class III, with significant differences just concerning specimens without a fiber post.
Fracture strength was not significantly influenced by fiber post placement in Class IV groups (720.71 N without post, 799.69 N
with post).

Conclusion

Data suggest that fiber post placement may significantly improve anterior teeth fracture strength
when at least two Class III composite fillings are associated to the endodontic treatment. No significant effect of fiber post
placement could be recorded when just one Class III or one Class IV composite filling were present.

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